FCC ID: 2BB6MS3-A Cell phone Signal Booster

Cell Phone Signal Booster S3-A Quick Start Guide How Full Signal Booster works 1. Outdoor antenna receives outside signal from the nearby cell tower and sends it to Full Signal Booster 2. The booster amplies the signal and sends to indoor antenna 3. Indoor antenna receives amplied signal and send it throughout your rooms. 1 3 2 Vice versa, indoor antenna receives cellphone signal and sends to the booster. The booster then amplies the signal and sends it to outdoor antenna. Outdoor antenna sends signal to the cell tower Then you can make phone calls and internet streaming. Important Knowledge before Installaone In order to make a successful installaon, there is a most crical informaon you need to know- You should Prevent Self-oscillaon during installaon. Self-oscillaon happens when outdoor antenna and indoor antenna are installed too close to each other. When self-oscillaon happens, instead of picking up signal from the Operator Cellular Tower, the outdoor antenna picks up the transmied signal from the indoor antenna, and repeatedly boosted, thus it will generate a signal loop with a lot of noise which is called Self-oscillaon. When self-Oscillaon happens, the booster will not boost useful signal from your cellular operator, so the system will not work. To prevent self-oscillaon during the installaon of a cellular signal booster, it is crucial to follow the given guidelines:

1. Outdoor antenna and indoor antenna need to be separated with an object or a distance. It is essenal to have a physical barrier, such as a wall, between the outdoor and indoor antennas. This helps to prevent the transmied signal from the indoor antenna from being picked up and amplied by the outdoor antenna. 2. Outdoor antenna and indoor antenna should not point to each other: Ensure that the outdoor antenna and indoor antenna are not facing each other directly. This reduces the chances of the outdoor antenna picking up the signal transmied by the indoor antenna. 3. Maintain a minimum required separaon distance: The outdoor antenna should be placed as far away as possible from the indoor antenna to minimize the risk of self-oscillaon. The minimum recommended separaon distances are:

Horizontal Distance: 20 feet (6 meters) Vercal Distance: 13 feet (4 meters) Horizontal:>6 meters(20) Vercal:>4 meters(13) By adhering to these guidelines, you can prevent self-oscillaon and ensure that the cellular signal booster funcons eecvely by amplifying the signal from the cellular operator rather than creang a loop with noise. Perfect Wrong Acceptable Wrong 1 2 3 4 1. Point to the tower 2. Antennas back to back 3. Two wall barriers 1. Not poinng to the tower 1. Point to the tower 2. Antennas back to back 3. No barriers, make sure vercal distance enough 1. Two antennas facing the same direcon 2.Vercal distance might not be enough Packge Contents Cellular Signal Booster Inside Antenna 75'& 60'

Cables Outside Antenna Power Supply Outside Antenna Mounng Bracket QUICK INSTALLATION GUIDE 01 Select the Locaon for the outside Antenna Note: This is the most crical step and will determine the perfor-

mance of your cellular signal booster. To select the ideal posion, follow these steps:

1.Find the Spot. Walk around your house with your cell phone, paying aenon to the signal strength displayed on your phone. Look for a locaon where your phone receives the strongest signal, at least 3-4 signal bars. 2.Check call quality. Make a few phone calls from that locaon, ensure the calls are clear and stable, this will be the ideal placement for the outdoor antenna. Install the outdoor Antenna 02 Install the outdoor antenna on the roof Install the outdoor antenna on the roof of your house directly above the locaon where you found in Step 1. Make sure to point the antenna towards the direcon of your cellular operator's tower. Connect the outdoor cable to the antenna securely. Ensure that the connecon is ght and properly fastened. Waterproof the connec-

tors with tapes. Please note the following important consideraons:

1.It is crucial to have a sucient separaon distance between the outdoor and indoor antennas. The minimum recommended distances are as follows:

Straight line distance: Over 30 feet (10 meters) Horizontal distance: 20 feet (6 meters) Vercal distance: 13 feet (4 meters) 2.To prevent the risk of lightning strikes, the height of the outdoor antenna should be lower than the highest point of your house. Horizontal:>6 meters(20) Vercal:>4 meters(13) 03 Install the Indoor Antenna Place the indoor antenna at where strong signal is needed most. The Indoor Antenna is a direconal antenna, it needs to be installed on the wall. Choosing a locaon facing all over your home will help to maximize your coverage area. Note:

1) Make sure the Outdoor Antenna and Indoor Antenna are not facing to each other. 2)Make sure there is sucient separaon between the Outdoor Antenna and Indoor Antenna. Connect antennas, power on 04 Connect the outdoor antenna cable to the OUTDOOR port on the cellular signal booster. Connect the indoor antenna cable to the INDOOR port on the cellular signal booster. Make sure the connecon is ght to maintain good signal transmission. Then power on the booster and check the signal strength in your desired area. 05 Opmize Coverage ISO Input Output CH1 CH2 CH3 1. Signal Bars The signal bars on the LCD screen of the repeater indicate the signal strength picked up by the outdoor antenna. More bars represent beer coverage that the repeater can produce. Aim for at least 3-4 signal bars to achieve opmal performance. If you're not receiving ideal signal recepon, try rotang the outdoor antenna to dierent direcons unl you achieve beer signal recepon. 2. Input Range The input range of -50 to -70dB represents the signal strength received by the booster. For beer coverage, aim for a signal strength around -60dB or higher. This indicates a stronger input signal for the repeater to amplify. 3. Output Range The output range of 0-20dBm represents the power level at which the booster is transming the amplied signal. For beer coverage results, aim for an output power around 10dBm or higher. This ensures a stronger and more reliable signal distribuon throughout the indoor area. 4. Isolaon (ISO) The ISO sign represents the isolaon between the outdoor antenna and the indoor antenna. When the ISO indicator is on, it indicates that the separaon between the antennas is insucient, which can result in poor coverage. To address this, increase the distance between the antennas and ensure they are not facing each other. This helps to minimize interference and maximize the eecveness of the repeater. SAFTY GUIDLINES Important guidelines and regulaons for the safe and proper use of the cellular repeater. 1.Power Supply: Only use the power supply provided with the repeater package. Using any other power supply may result in improper funconing or damage to the device. 2.Antenna Safety: Ensure that any antenna used with the repeater is located at least 8 inches (20 cenmeters) away from all persons. This is to minimize potenal exposure to radio frequency (RF) energy. 3.Compliance with FCC Rules: The repeater has been tested and found to comply with the limits set for a class B digital device under Part 15 of the FCC Rules. These limits are designed to protect against harmful interference in residenal installaons. 4.Harmful Interference: If the repeater causes interference to network operators or other communicaon systems, it is recom-

mended to take the following measures:

Relocate the Outdoor Antenna. Increase the separaon between the Outdoor Antenna and Indoor Antenna. Seek assistance from the supplier or local installers for further guidance. 5.Compliance with Regulatory Requests: If requested by the FCC (or ISED in Canada) or a licensed wireless service provider, it is manda-

tory to cease operang the device. It is crucial to adhere to these guidelines to ensure proper funcon-

ality, minimize interference, and comply with regulatory require-

ments. If you have any specic concerns or quesons, it is advisable to consult the supplier or seek assistance from local professionals experienced in installing and operang cellular repeaters. Trouble Shoong FAQ Soluon Aer installaon, the signal improvement is not signicant, and the indoor coverage area is limited 1. Adjust the posion or direcon of the outdoor antenna, try to get a beer signal recepon. 2.Check if the cables are properly connected. 3. Raise the outdoor antenna so that it can receive beer signal. 4. Replace a higher gain outdoor antenna The phone signal is full, but the call quality is poor Aer installaon, the signal did not improve, but it was worse Check the Booster LCD screen, if the ISO sign is on, it indicates that the separaon between the antennas is insucient. It is essenal to increase the distance between the antennas, or increase physical barriers, such as a wall, between the outdoor and indoor antennas. Make sure the antennas are not facing to each other, then restart the booster. Check the Booster LCD screen, if the ISO sign is on, it indicates that the separaon between the antennas is insucient. It is essenal to increase the distance between the antennas, or increase physical barriers, such as a wall, between the outdoor and indoor antennas. Make sure the antennas are not facing to each other, then restart the booster. I have been using it normally before, but suddenly the signal is not good aer using it for a period of me 1. Check the cable connecons. 2. Check if the outdoor cable is installed securely without damage. 3. Check if LCD indicator is normal, if it is o, booster device need to be sent to supplier for repair. 1. Adjust the posion or direcon of the outdoor antenna, try to get a beer signal 3. Raise the outdoor antenna so that it can receive beer signal. 4. Replace a higher gain outdoor antenna Product Specicaons Model: S3-A Network: cellular/Broadband PCS/Low A-E Blocks/

700 MHz Upper C Block Model No. S3-A recepon. 2.Check if the cables are properly connected. Working Band Cellular 700 MHz Upper C Block Broadban d PCS Low A-E Blocks UL Frequency Range (MHz) DL Frquency Range (MHz) Maximum Gain Maximum Output Power AGC Range Ripple in Band Impediance I/O Port Weight 824-849 777-787 1850-1915 699 - 716 869-894 746-756 1930-1995 729 - 746 673 dB 201 dBm 30dB 7dB 50 ohm N-Feamle Booster Device 1.0Kg Whole Kit 4.5 kg 1. Check the cable connecons. 2. Check if the outdoor cable is installed securely without damage. 3. Check if LCD indicator is normal, if it is o, booster device need to be sent to supplier for repair. Dimension 180 120 25 m Power Supply AC: 100-240 V, 50/60Hz, Output DC 5V/2A Environmental Condion Booster: IP40 Antenna: IP65

(1)Usage of unauthorized antennas, cables, and/or coupling devices may result in poor effect and, insevere cases, equipment damage.

(2)a complete list of authorized antennas, cables, and/or coupling devices:

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation This equipment should be installed and operated with a minumum distance of 20cm between the radiator and your body. The antenna for the device must be installed to comply with the 10 meter above ground maximum antenna height limitation This equipment complies with IC radiation exposure limits set forth for an uncontrolledenvironment. This equipment should be installed and operated with minimum distance of 20 cmbetween the radiator and your body. This transmitter must not be co-located or operating inconjunction with any other antenna or transmitter. This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subjectto the following two conditions:

(1) This device may not cause interference, and

(2) This device must accept any interference, including interference that may cause undesiredoperation of the device. Le present appareil est conforme aux CNR d'lndustrie Canada applicables aux appareils radioexempts de licence. L'exploitation est autorisee aux deux conditions suivantes:

(1) l'appareil ne doit pas produire de brouillage, et

(2) 'utilisateur de 'appareil doit accepter tout brouillage radioelectrique subi, meme si lebrouillage est susceptible d'en compromettre le fonctionnement 1) For Consumer Zone Enhancers:

This is a CONSUMER device. BEFORE USE, you must meet all requirements set out in CPC-2-1-05. This device MUST ONLY be operated with approved antennas and cables as specified by the manufacturer. Antennas must be installed in a way where the minimum separation distance between the antennas and a user (or bystander) specified by the manufacturer is ALWAYS maintained. In order to reduce oscillations it is recommended that sufficient separation distance is maintained between the donor and server antennas of the zone enhancer system. You MUST cease operation of this device immediately if requested by ISED or a licensed wireless service provider. WARNING:E911 location information may not be provided or may be inaccurate for calls served by using this device. Ce produit est un appareil GRAND PUBLIC. AVANT DE LUTILISER, vous devez vous conformer toutes les exigences tablies dans la CPC 2-1-05. Cet appareil NE DOIT TRE UTILIS quavec des antennes et des cbles approuvs, conformment aux indications du fabricant. Les antennes doivent tre installes de manire ce que la distance minimale de sparation entre les antennes et un utilisateur (ou un passant) spcifie par le fabricant soit TOUJOURS respecte. Afin de rduire les oscillations, il est recommandde maintenir une distance de sparation suffisante entre les antennes du donateur et du serveur du systme denrichisseur de zone. Vous DEVEZ cesser dutiliser cet appareil immdiatement la demande dISDE ou dun fournisseurde services sans fil autoris. AVERTISSEMENT:Les informations relatives la localisation pour le service E911 peuvent tre non fournies ou inexactes pour les appels 2) For Consumer Zone Enhancers certified for fixed operation, in addition to the text specified under item 1, the following text shall also be transitant par cet appareil. included:

This device may operate in a fixed location only, for in-building use. Cet appareil peut fonctionner seulement un emplacement fixe lintrieur dun btiment. label:

CPC-2- 1-05 Zone Enhancers - Spectrum management and telecommunications https://ised-isde.canada.ca/site/spectrum-management-telecommunications/en/learn-more/key-

documents/procedures/client -procedures-circulars-cpc/cpc-2-1-05-zone-enhancers F22, Tower B, RuiChuangGuoJi Plaza, No.8 WangJing East Road, Chaoyang CEREVO TECHNOLOGY LIMITED District, Beijing, China 100102 Contact: Esson Diao Tel: 18218747363 Email:619991099@qq.com S3-A Quick Start Guide

Label Cellular : Uplink: 824MHz - 849MHz, Downlink: 869MHz - 894MHz Broadband PCS Uplink: 1850-1915MHz, Downlink: 1930-1995MHz Low A-E Blocks: 699-716MHz, Downlink: 729-746MHz 700 MHz Upper C Block: 777-787MHz, Downlink: 746-756MHz Product: Cell Phone Signal Booster Model: S3-A FCC ID: 2BB6MS3-A IC : 31014-S3A Made in China the antenna for the device must be installed to comply with the 10 meter above ground maximum antenna height limitation This is a CONSUMER device. BEFORE USE, you MUST REGISTER THIS DEVICE with your wireless provider and have your provider's consent. Most wireless providers consent to the use of signal boosters. Some providers may not consent to the use of this device on their network. lf you are unsure, contact your provider. In Canada, BEFORE USE you must meet all requirements set out in ISED CPC-2-1-05. You MUST operate this device with approved antennas and cables as specified by the manufacturer. Antennas MUST be installed at least 20 cm (8 inches) from (i.e., MUST NOT be installed within 20 cm of) any person. You MUST cease operating this device immediately if requested by the FCC (or ISED in Canada) or a licensed wireless service provider. WARNING. E911 location information may not be provided or may be inaccurate for calls served by using this device. This device may be operated ONLY in a fixed location (i.e., may operate in a fixed location only) for in-building use Location:

CEREVO TECHNOLOGY LIMITED Section 2.911(d)(5)(i) Certification Equipment Type Company name: CEREVO TECHNOLOGY LIMITED Address: F22, Tower B, RuiChuangGuoJi Plaza, No.8 WangJing East Road, Chaoyang District, Beijing, China 100102 Product Name: Cell Phone Signal Booster FCC ID: 2BB6MS3-A Model(s): S3-A 2.911(d)(5)(i) Equipment Type We, CEREVO TECHNOLOGY LIMITED (the applicant) certify that the equipment for which authorization is sought through certification is not:

Prohibited from receiving an equipment authorization pursuant to 2.903; of the FCC rules. Identified as an equipment type in the Covered List NOTE 1 Yours sincerely, Name:

Esson Diao Date: 2023-08-07 Manager Title:

Company name: CEREVO TECHNOLOGY LIMITED NOTE 1 Covered List; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References;

1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the 2.911 (d)(5)(i) Equipment Type Attestation v1.2

CEREVO TECHNOLOGY LIMITED Section 2.911(d)(5)(ii) Certification Applicant (Covered List ) Company name: CEREVO TECHNOLOGY LIMITED Address: F22, Tower B, RuiChuangGuoJi Plaza, No.8 WangJing East Road, Chaoyang District, Beijing, China 100102 Product Name: Cell Phone Signal Booster FCC ID: 2BB6MS3-A Model(s): S3-A 2.911(d)(5)(ii) Applicant filing We, [CEREVO TECHNOLOGY LIMITED] (the applicant) certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the Covered List NOTE 2, established pursuant to 1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Esson Diao Date: 2023-08-07 Title and Company name:

Manager CEREVO TECHNOLOGY LIMITED NOTE 1 Delete option not applicable to this application. NOTE 2 Covered List; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References;

1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the 2.911 (d)(5)(ii) Applicant Attestation v1.3

CEREVO TECHNOLOGY LIMITED Agent Authorization Company: CEREVO TECHNOLOGY LIMITED Address: F22, Tower B, RuiChuangGuoJi Plaza, No.8 WangJing East Road, Chaoyang District, Beijing, China 100102 Product Name: Cell Phone Signal Booster Model Number(s): S3-A Product Description: Cell Phone Signal Booster We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature:

Name:

Esson Diao Title:

Manager Company: CEREVO TECHNOLOGY LIMITED Date: 2023-08-08

CEREVO TECHNOLOGY LIMITED Aug. 0 7 , 2023 Attestation for signal booster:

FC ID:2BB6MS3-A IC :31014-S3A Each Signal Booster certificated under FCC ID: 2BB6MS3-A ,IC 31014-S3 are manufactured

and individually tested to ensure FCC compliance

( 1

) Licensee consent for Fixed consumer booster has been obtained ( consent be made available upon FCC/ TCB request)

( 2 ) NPS and other compliance/ safeguard features have been implemented

( 3 ) NPS and other compliance/ safeguard features are defaulted to ON configuration ( in operation)

( 4 ) NPS and other compliance/ safeguard features cannot be field reconfigured, disabled or removed

( 5 ) This Consumer booster is not user programmable, does not need fine tuning or adjustment, does not require professional installation .

( 6 ) Future software upgrade will not cause non- compliance. Yours sincerely, Esson Diao

CEREVO TECHNOLOGY LIMITED Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Subject; Request for Long Term Confidentiality FCC ID: 2BB6MS3-A Date: 2023-08-08 To Whom It May Concern, Pursuant to the provisions of the Commissions rules Title 47 Sections 0.457 and 0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram BOM Operational Description Tune-up Procedure SOFTWARE SECURITY REQUIREMENTS FOR U-NII DEVICES It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature:

Name: Esson Diao Title: Manager

CEREVO TECHNOLOGY LIMITED. July 28

, 2023 Subject: Tuning and Adjustment of Signal booster, FCC ID2BB6MS3-A There are no external tuning adjustments, the amplifier is factory set not exceed maximum gains,

. power levels, and downlink dependent region ( RSSI) set points as provided in the test results Yours sincerely, Esson Diao

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